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linux_dsm_epyc7002/drivers/iio/frequency/ad9523.c
Alexandru Ardelean d3be83244c iio: remove explicit IIO device parent assignment 
This patch applies the semantic patch:
@@
expression I, P, SP;
@@
   I = devm_iio_device_alloc(P, SP);
   ...
-  I->dev.parent = P;

It updates 302 files and does 307 deletions.
This semantic patch also removes some comments like
'/* Establish that the iio_dev is a child of the i2c device */'

But this is is only done in case where the block is left empty.

The patch does not seem to cover all cases. It looks like in some cases a
different variable is used in some cases to assign the parent, but it
points to the same reference.
In other cases, the block covered by ... may be just too big to be covered
by the semantic patch.

However, this looks pretty good as well, as it does cover a big bulk of the
drivers that should remove the parent assignment.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-06-14 11:49:59 +01:00

1087 lines
29 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* AD9523 SPI Low Jitter Clock Generator
*
* Copyright 2012 Analog Devices Inc.
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/gpio/consumer.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/frequency/ad9523.h>
#define AD9523_READ (1 << 15)
#define AD9523_WRITE (0 << 15)
#define AD9523_CNT(x) (((x) - 1) << 13)
#define AD9523_ADDR(x) ((x) & 0xFFF)
#define AD9523_R1B (1 << 16)
#define AD9523_R2B (2 << 16)
#define AD9523_R3B (3 << 16)
#define AD9523_TRANSF_LEN(x) ((x) >> 16)
#define AD9523_SERIAL_PORT_CONFIG (AD9523_R1B | 0x0)
#define AD9523_VERSION_REGISTER (AD9523_R1B | 0x2)
#define AD9523_PART_REGISTER (AD9523_R1B | 0x3)
#define AD9523_READBACK_CTRL (AD9523_R1B | 0x4)
#define AD9523_EEPROM_CUSTOMER_VERSION_ID (AD9523_R2B | 0x6)
#define AD9523_PLL1_REF_A_DIVIDER (AD9523_R2B | 0x11)
#define AD9523_PLL1_REF_B_DIVIDER (AD9523_R2B | 0x13)
#define AD9523_PLL1_REF_TEST_DIVIDER (AD9523_R1B | 0x14)
#define AD9523_PLL1_FEEDBACK_DIVIDER (AD9523_R2B | 0x17)
#define AD9523_PLL1_CHARGE_PUMP_CTRL (AD9523_R2B | 0x19)
#define AD9523_PLL1_INPUT_RECEIVERS_CTRL (AD9523_R1B | 0x1A)
#define AD9523_PLL1_REF_CTRL (AD9523_R1B | 0x1B)
#define AD9523_PLL1_MISC_CTRL (AD9523_R1B | 0x1C)
#define AD9523_PLL1_LOOP_FILTER_CTRL (AD9523_R1B | 0x1D)
#define AD9523_PLL2_CHARGE_PUMP (AD9523_R1B | 0xF0)
#define AD9523_PLL2_FEEDBACK_DIVIDER_AB (AD9523_R1B | 0xF1)
#define AD9523_PLL2_CTRL (AD9523_R1B | 0xF2)
#define AD9523_PLL2_VCO_CTRL (AD9523_R1B | 0xF3)
#define AD9523_PLL2_VCO_DIVIDER (AD9523_R1B | 0xF4)
#define AD9523_PLL2_LOOP_FILTER_CTRL (AD9523_R2B | 0xF6)
#define AD9523_PLL2_R2_DIVIDER (AD9523_R1B | 0xF7)
#define AD9523_CHANNEL_CLOCK_DIST(ch) (AD9523_R3B | (0x192 + 3 * ch))
#define AD9523_PLL1_OUTPUT_CTRL (AD9523_R1B | 0x1BA)
#define AD9523_PLL1_OUTPUT_CHANNEL_CTRL (AD9523_R1B | 0x1BB)
#define AD9523_READBACK_0 (AD9523_R1B | 0x22C)
#define AD9523_READBACK_1 (AD9523_R1B | 0x22D)
#define AD9523_STATUS_SIGNALS (AD9523_R3B | 0x232)
#define AD9523_POWER_DOWN_CTRL (AD9523_R1B | 0x233)
#define AD9523_IO_UPDATE (AD9523_R1B | 0x234)
#define AD9523_EEPROM_DATA_XFER_STATUS (AD9523_R1B | 0xB00)
#define AD9523_EEPROM_ERROR_READBACK (AD9523_R1B | 0xB01)
#define AD9523_EEPROM_CTRL1 (AD9523_R1B | 0xB02)
#define AD9523_EEPROM_CTRL2 (AD9523_R1B | 0xB03)
/* AD9523_SERIAL_PORT_CONFIG */
#define AD9523_SER_CONF_SDO_ACTIVE (1 << 7)
#define AD9523_SER_CONF_SOFT_RESET (1 << 5)
/* AD9523_READBACK_CTRL */
#define AD9523_READBACK_CTRL_READ_BUFFERED (1 << 0)
/* AD9523_PLL1_CHARGE_PUMP_CTRL */
#define AD9523_PLL1_CHARGE_PUMP_CURRENT_nA(x) (((x) / 500) & 0x7F)
#define AD9523_PLL1_CHARGE_PUMP_TRISTATE (1 << 7)
#define AD9523_PLL1_CHARGE_PUMP_MODE_NORMAL (3 << 8)
#define AD9523_PLL1_CHARGE_PUMP_MODE_PUMP_DOWN (2 << 8)
#define AD9523_PLL1_CHARGE_PUMP_MODE_PUMP_UP (1 << 8)
#define AD9523_PLL1_CHARGE_PUMP_MODE_TRISTATE (0 << 8)
#define AD9523_PLL1_BACKLASH_PW_MIN (0 << 10)
#define AD9523_PLL1_BACKLASH_PW_LOW (1 << 10)
#define AD9523_PLL1_BACKLASH_PW_HIGH (2 << 10)
#define AD9523_PLL1_BACKLASH_PW_MAX (3 << 10)
/* AD9523_PLL1_INPUT_RECEIVERS_CTRL */
#define AD9523_PLL1_REF_TEST_RCV_EN (1 << 7)
#define AD9523_PLL1_REFB_DIFF_RCV_EN (1 << 6)
#define AD9523_PLL1_REFA_DIFF_RCV_EN (1 << 5)
#define AD9523_PLL1_REFB_RCV_EN (1 << 4)
#define AD9523_PLL1_REFA_RCV_EN (1 << 3)
#define AD9523_PLL1_REFA_REFB_PWR_CTRL_EN (1 << 2)
#define AD9523_PLL1_OSC_IN_CMOS_NEG_INP_EN (1 << 1)
#define AD9523_PLL1_OSC_IN_DIFF_EN (1 << 0)
/* AD9523_PLL1_REF_CTRL */
#define AD9523_PLL1_BYPASS_REF_TEST_DIV_EN (1 << 7)
#define AD9523_PLL1_BYPASS_FEEDBACK_DIV_EN (1 << 6)
#define AD9523_PLL1_ZERO_DELAY_MODE_INT (1 << 5)
#define AD9523_PLL1_ZERO_DELAY_MODE_EXT (0 << 5)
#define AD9523_PLL1_OSC_IN_PLL_FEEDBACK_EN (1 << 4)
#define AD9523_PLL1_ZD_IN_CMOS_NEG_INP_EN (1 << 3)
#define AD9523_PLL1_ZD_IN_DIFF_EN (1 << 2)
#define AD9523_PLL1_REFB_CMOS_NEG_INP_EN (1 << 1)
#define AD9523_PLL1_REFA_CMOS_NEG_INP_EN (1 << 0)
/* AD9523_PLL1_MISC_CTRL */
#define AD9523_PLL1_REFB_INDEP_DIV_CTRL_EN (1 << 7)
#define AD9523_PLL1_OSC_CTRL_FAIL_VCC_BY2_EN (1 << 6)
#define AD9523_PLL1_REF_MODE(x) ((x) << 2)
#define AD9523_PLL1_BYPASS_REFB_DIV (1 << 1)
#define AD9523_PLL1_BYPASS_REFA_DIV (1 << 0)
/* AD9523_PLL1_LOOP_FILTER_CTRL */
#define AD9523_PLL1_LOOP_FILTER_RZERO(x) ((x) & 0xF)
/* AD9523_PLL2_CHARGE_PUMP */
#define AD9523_PLL2_CHARGE_PUMP_CURRENT_nA(x) ((x) / 3500)
/* AD9523_PLL2_FEEDBACK_DIVIDER_AB */
#define AD9523_PLL2_FB_NDIV_A_CNT(x) (((x) & 0x3) << 6)
#define AD9523_PLL2_FB_NDIV_B_CNT(x) (((x) & 0x3F) << 0)
#define AD9523_PLL2_FB_NDIV(a, b) (4 * (b) + (a))
/* AD9523_PLL2_CTRL */
#define AD9523_PLL2_CHARGE_PUMP_MODE_NORMAL (3 << 0)
#define AD9523_PLL2_CHARGE_PUMP_MODE_PUMP_DOWN (2 << 0)
#define AD9523_PLL2_CHARGE_PUMP_MODE_PUMP_UP (1 << 0)
#define AD9523_PLL2_CHARGE_PUMP_MODE_TRISTATE (0 << 0)
#define AD9523_PLL2_BACKLASH_PW_MIN (0 << 2)
#define AD9523_PLL2_BACKLASH_PW_LOW (1 << 2)
#define AD9523_PLL2_BACKLASH_PW_HIGH (2 << 2)
#define AD9523_PLL2_BACKLASH_PW_MAX (3 << 1)
#define AD9523_PLL2_BACKLASH_CTRL_EN (1 << 4)
#define AD9523_PLL2_FREQ_DOUBLER_EN (1 << 5)
#define AD9523_PLL2_LOCK_DETECT_PWR_DOWN_EN (1 << 7)
/* AD9523_PLL2_VCO_CTRL */
#define AD9523_PLL2_VCO_CALIBRATE (1 << 1)
#define AD9523_PLL2_FORCE_VCO_MIDSCALE (1 << 2)
#define AD9523_PLL2_FORCE_REFERENCE_VALID (1 << 3)
#define AD9523_PLL2_FORCE_RELEASE_SYNC (1 << 4)
/* AD9523_PLL2_VCO_DIVIDER */
#define AD9523_PLL2_VCO_DIV_M1(x) ((((x) - 3) & 0x3) << 0)
#define AD9523_PLL2_VCO_DIV_M2(x) ((((x) - 3) & 0x3) << 4)
#define AD9523_PLL2_VCO_DIV_M1_PWR_DOWN_EN (1 << 2)
#define AD9523_PLL2_VCO_DIV_M2_PWR_DOWN_EN (1 << 6)
/* AD9523_PLL2_LOOP_FILTER_CTRL */
#define AD9523_PLL2_LOOP_FILTER_CPOLE1(x) (((x) & 0x7) << 0)
#define AD9523_PLL2_LOOP_FILTER_RZERO(x) (((x) & 0x7) << 3)
#define AD9523_PLL2_LOOP_FILTER_RPOLE2(x) (((x) & 0x7) << 6)
#define AD9523_PLL2_LOOP_FILTER_RZERO_BYPASS_EN (1 << 8)
/* AD9523_PLL2_R2_DIVIDER */
#define AD9523_PLL2_R2_DIVIDER_VAL(x) (((x) & 0x1F) << 0)
/* AD9523_CHANNEL_CLOCK_DIST */
#define AD9523_CLK_DIST_DIV_PHASE(x) (((x) & 0x3F) << 18)
#define AD9523_CLK_DIST_DIV_PHASE_REV(x) ((ret >> 18) & 0x3F)
#define AD9523_CLK_DIST_DIV(x) ((((x) - 1) & 0x3FF) << 8)
#define AD9523_CLK_DIST_DIV_REV(x) (((ret >> 8) & 0x3FF) + 1)
#define AD9523_CLK_DIST_INV_DIV_OUTPUT_EN (1 << 7)
#define AD9523_CLK_DIST_IGNORE_SYNC_EN (1 << 6)
#define AD9523_CLK_DIST_PWR_DOWN_EN (1 << 5)
#define AD9523_CLK_DIST_LOW_PWR_MODE_EN (1 << 4)
#define AD9523_CLK_DIST_DRIVER_MODE(x) (((x) & 0xF) << 0)
/* AD9523_PLL1_OUTPUT_CTRL */
#define AD9523_PLL1_OUTP_CTRL_VCO_DIV_SEL_CH6_M2 (1 << 7)
#define AD9523_PLL1_OUTP_CTRL_VCO_DIV_SEL_CH5_M2 (1 << 6)
#define AD9523_PLL1_OUTP_CTRL_VCO_DIV_SEL_CH4_M2 (1 << 5)
#define AD9523_PLL1_OUTP_CTRL_CMOS_DRV_WEAK (1 << 4)
#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_1 (0 << 0)
#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_2 (1 << 0)
#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_4 (2 << 0)
#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_8 (4 << 0)
#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_16 (8 << 0)
/* AD9523_PLL1_OUTPUT_CHANNEL_CTRL */
#define AD9523_PLL1_OUTP_CH_CTRL_OUTPUT_PWR_DOWN_EN (1 << 7)
#define AD9523_PLL1_OUTP_CH_CTRL_VCO_DIV_SEL_CH9_M2 (1 << 6)
#define AD9523_PLL1_OUTP_CH_CTRL_VCO_DIV_SEL_CH8_M2 (1 << 5)
#define AD9523_PLL1_OUTP_CH_CTRL_VCO_DIV_SEL_CH7_M2 (1 << 4)
#define AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH3 (1 << 3)
#define AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH2 (1 << 2)
#define AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH1 (1 << 1)
#define AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH0 (1 << 0)
/* AD9523_READBACK_0 */
#define AD9523_READBACK_0_STAT_PLL2_REF_CLK (1 << 7)
#define AD9523_READBACK_0_STAT_PLL2_FB_CLK (1 << 6)
#define AD9523_READBACK_0_STAT_VCXO (1 << 5)
#define AD9523_READBACK_0_STAT_REF_TEST (1 << 4)
#define AD9523_READBACK_0_STAT_REFB (1 << 3)
#define AD9523_READBACK_0_STAT_REFA (1 << 2)
#define AD9523_READBACK_0_STAT_PLL2_LD (1 << 1)
#define AD9523_READBACK_0_STAT_PLL1_LD (1 << 0)
/* AD9523_READBACK_1 */
#define AD9523_READBACK_1_HOLDOVER_ACTIVE (1 << 3)
#define AD9523_READBACK_1_AUTOMODE_SEL_REFB (1 << 2)
#define AD9523_READBACK_1_VCO_CALIB_IN_PROGRESS (1 << 0)
/* AD9523_STATUS_SIGNALS */
#define AD9523_STATUS_SIGNALS_SYNC_MAN_CTRL (1 << 16)
#define AD9523_STATUS_MONITOR_01_PLL12_LOCKED (0x302)
/* AD9523_POWER_DOWN_CTRL */
#define AD9523_POWER_DOWN_CTRL_PLL1_PWR_DOWN (1 << 2)
#define AD9523_POWER_DOWN_CTRL_PLL2_PWR_DOWN (1 << 1)
#define AD9523_POWER_DOWN_CTRL_DIST_PWR_DOWN (1 << 0)
/* AD9523_IO_UPDATE */
#define AD9523_IO_UPDATE_EN (1 << 0)
/* AD9523_EEPROM_DATA_XFER_STATUS */
#define AD9523_EEPROM_DATA_XFER_IN_PROGRESS (1 << 0)
/* AD9523_EEPROM_ERROR_READBACK */
#define AD9523_EEPROM_ERROR_READBACK_FAIL (1 << 0)
/* AD9523_EEPROM_CTRL1 */
#define AD9523_EEPROM_CTRL1_SOFT_EEPROM (1 << 1)
#define AD9523_EEPROM_CTRL1_EEPROM_WRITE_PROT_DIS (1 << 0)
/* AD9523_EEPROM_CTRL2 */
#define AD9523_EEPROM_CTRL2_REG2EEPROM (1 << 0)
#define AD9523_NUM_CHAN 14
#define AD9523_NUM_CHAN_ALT_CLK_SRC 10
/* Helpers to avoid excess line breaks */
#define AD_IFE(_pde, _a, _b) ((pdata->_pde) ? _a : _b)
#define AD_IF(_pde, _a) AD_IFE(_pde, _a, 0)
enum {
AD9523_STAT_PLL1_LD,
AD9523_STAT_PLL2_LD,
AD9523_STAT_REFA,
AD9523_STAT_REFB,
AD9523_STAT_REF_TEST,
AD9523_STAT_VCXO,
AD9523_STAT_PLL2_FB_CLK,
AD9523_STAT_PLL2_REF_CLK,
AD9523_SYNC,
AD9523_EEPROM,
};
enum {
AD9523_VCO1,
AD9523_VCO2,
AD9523_VCXO,
AD9523_NUM_CLK_SRC,
};
struct ad9523_state {
struct spi_device *spi;
struct regulator *reg;
struct ad9523_platform_data *pdata;
struct iio_chan_spec ad9523_channels[AD9523_NUM_CHAN];
struct gpio_desc *pwrdown_gpio;
struct gpio_desc *reset_gpio;
struct gpio_desc *sync_gpio;
unsigned long vcxo_freq;
unsigned long vco_freq;
unsigned long vco_out_freq[AD9523_NUM_CLK_SRC];
unsigned char vco_out_map[AD9523_NUM_CHAN_ALT_CLK_SRC];
/*
* Lock for accessing device registers. Some operations require
* multiple consecutive R/W operations, during which the device
* shouldn't be interrupted. The buffers are also shared across
* all operations so need to be protected on stand alone reads and
* writes.
*/
struct mutex lock;
/*
* DMA (thus cache coherency maintenance) requires the
* transfer buffers to live in their own cache lines.
*/
union {
__be32 d32;
u8 d8[4];
} data[2] ____cacheline_aligned;
};
static int ad9523_read(struct iio_dev *indio_dev, unsigned int addr)
{
struct ad9523_state *st = iio_priv(indio_dev);
int ret;
/* We encode the register size 1..3 bytes into the register address.
* On transfer we get the size from the register datum, and make sure
* the result is properly aligned.
*/
struct spi_transfer t[] = {
{
.tx_buf = &st->data[0].d8[2],
.len = 2,
}, {
.rx_buf = &st->data[1].d8[4 - AD9523_TRANSF_LEN(addr)],
.len = AD9523_TRANSF_LEN(addr),
},
};
st->data[0].d32 = cpu_to_be32(AD9523_READ |
AD9523_CNT(AD9523_TRANSF_LEN(addr)) |
AD9523_ADDR(addr));
ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t));
if (ret < 0)
dev_err(&indio_dev->dev, "read failed (%d)", ret);
else
ret = be32_to_cpu(st->data[1].d32) & (0xFFFFFF >>
(8 * (3 - AD9523_TRANSF_LEN(addr))));
return ret;
};
static int ad9523_write(struct iio_dev *indio_dev,
unsigned int addr, unsigned int val)
{
struct ad9523_state *st = iio_priv(indio_dev);
int ret;
struct spi_transfer t[] = {
{
.tx_buf = &st->data[0].d8[2],
.len = 2,
}, {
.tx_buf = &st->data[1].d8[4 - AD9523_TRANSF_LEN(addr)],
.len = AD9523_TRANSF_LEN(addr),
},
};
st->data[0].d32 = cpu_to_be32(AD9523_WRITE |
AD9523_CNT(AD9523_TRANSF_LEN(addr)) |
AD9523_ADDR(addr));
st->data[1].d32 = cpu_to_be32(val);
ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t));
if (ret < 0)
dev_err(&indio_dev->dev, "write failed (%d)", ret);
return ret;
}
static int ad9523_io_update(struct iio_dev *indio_dev)
{
return ad9523_write(indio_dev, AD9523_IO_UPDATE, AD9523_IO_UPDATE_EN);
}
static int ad9523_vco_out_map(struct iio_dev *indio_dev,
unsigned int ch, unsigned int out)
{
struct ad9523_state *st = iio_priv(indio_dev);
int ret;
unsigned int mask;
switch (ch) {
case 0 ... 3:
ret = ad9523_read(indio_dev, AD9523_PLL1_OUTPUT_CHANNEL_CTRL);
if (ret < 0)
break;
mask = AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH0 << ch;
if (out) {
ret |= mask;
out = 2;
} else {
ret &= ~mask;
}
ret = ad9523_write(indio_dev,
AD9523_PLL1_OUTPUT_CHANNEL_CTRL, ret);
break;
case 4 ... 6:
ret = ad9523_read(indio_dev, AD9523_PLL1_OUTPUT_CTRL);
if (ret < 0)
break;
mask = AD9523_PLL1_OUTP_CTRL_VCO_DIV_SEL_CH4_M2 << (ch - 4);
if (out)
ret |= mask;
else
ret &= ~mask;
ret = ad9523_write(indio_dev, AD9523_PLL1_OUTPUT_CTRL, ret);
break;
case 7 ... 9:
ret = ad9523_read(indio_dev, AD9523_PLL1_OUTPUT_CHANNEL_CTRL);
if (ret < 0)
break;
mask = AD9523_PLL1_OUTP_CH_CTRL_VCO_DIV_SEL_CH7_M2 << (ch - 7);
if (out)
ret |= mask;
else
ret &= ~mask;
ret = ad9523_write(indio_dev,
AD9523_PLL1_OUTPUT_CHANNEL_CTRL, ret);
break;
default:
return 0;
}
st->vco_out_map[ch] = out;
return ret;
}
static int ad9523_set_clock_provider(struct iio_dev *indio_dev,
unsigned int ch, unsigned long freq)
{
struct ad9523_state *st = iio_priv(indio_dev);
long tmp1, tmp2;
bool use_alt_clk_src;
switch (ch) {
case 0 ... 3:
use_alt_clk_src = (freq == st->vco_out_freq[AD9523_VCXO]);
break;
case 4 ... 9:
tmp1 = st->vco_out_freq[AD9523_VCO1] / freq;
tmp2 = st->vco_out_freq[AD9523_VCO2] / freq;
tmp1 *= freq;
tmp2 *= freq;
use_alt_clk_src = (abs(tmp1 - freq) > abs(tmp2 - freq));
break;
default:
/* Ch 10..14: No action required, return success */
return 0;
}
return ad9523_vco_out_map(indio_dev, ch, use_alt_clk_src);
}
static int ad9523_store_eeprom(struct iio_dev *indio_dev)
{
int ret, tmp;
ret = ad9523_write(indio_dev, AD9523_EEPROM_CTRL1,
AD9523_EEPROM_CTRL1_EEPROM_WRITE_PROT_DIS);
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_EEPROM_CTRL2,
AD9523_EEPROM_CTRL2_REG2EEPROM);
if (ret < 0)
return ret;
tmp = 4;
do {
msleep(20);
ret = ad9523_read(indio_dev,
AD9523_EEPROM_DATA_XFER_STATUS);
if (ret < 0)
return ret;
} while ((ret & AD9523_EEPROM_DATA_XFER_IN_PROGRESS) && tmp--);
ret = ad9523_write(indio_dev, AD9523_EEPROM_CTRL1, 0);
if (ret < 0)
return ret;
ret = ad9523_read(indio_dev, AD9523_EEPROM_ERROR_READBACK);
if (ret < 0)
return ret;
if (ret & AD9523_EEPROM_ERROR_READBACK_FAIL) {
dev_err(&indio_dev->dev, "Verify EEPROM failed");
ret = -EIO;
}
return ret;
}
static int ad9523_sync(struct iio_dev *indio_dev)
{
int ret, tmp;
ret = ad9523_read(indio_dev, AD9523_STATUS_SIGNALS);
if (ret < 0)
return ret;
tmp = ret;
tmp |= AD9523_STATUS_SIGNALS_SYNC_MAN_CTRL;
ret = ad9523_write(indio_dev, AD9523_STATUS_SIGNALS, tmp);
if (ret < 0)
return ret;
ad9523_io_update(indio_dev);
tmp &= ~AD9523_STATUS_SIGNALS_SYNC_MAN_CTRL;
ret = ad9523_write(indio_dev, AD9523_STATUS_SIGNALS, tmp);
if (ret < 0)
return ret;
return ad9523_io_update(indio_dev);
}
static ssize_t ad9523_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
struct ad9523_state *st = iio_priv(indio_dev);
bool state;
int ret;
ret = strtobool(buf, &state);
if (ret < 0)
return ret;
if (!state)
return len;
mutex_lock(&st->lock);
switch ((u32)this_attr->address) {
case AD9523_SYNC:
ret = ad9523_sync(indio_dev);
break;
case AD9523_EEPROM:
ret = ad9523_store_eeprom(indio_dev);
break;
default:
ret = -ENODEV;
}
mutex_unlock(&st->lock);
return ret ? ret : len;
}
static ssize_t ad9523_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
struct ad9523_state *st = iio_priv(indio_dev);
int ret;
mutex_lock(&st->lock);
ret = ad9523_read(indio_dev, AD9523_READBACK_0);
if (ret >= 0) {
ret = sprintf(buf, "%d\n", !!(ret & (1 <<
(u32)this_attr->address)));
}
mutex_unlock(&st->lock);
return ret;
}
static IIO_DEVICE_ATTR(pll1_locked, S_IRUGO,
ad9523_show,
NULL,
AD9523_STAT_PLL1_LD);
static IIO_DEVICE_ATTR(pll2_locked, S_IRUGO,
ad9523_show,
NULL,
AD9523_STAT_PLL2_LD);
static IIO_DEVICE_ATTR(pll1_reference_clk_a_present, S_IRUGO,
ad9523_show,
NULL,
AD9523_STAT_REFA);
static IIO_DEVICE_ATTR(pll1_reference_clk_b_present, S_IRUGO,
ad9523_show,
NULL,
AD9523_STAT_REFB);
static IIO_DEVICE_ATTR(pll1_reference_clk_test_present, S_IRUGO,
ad9523_show,
NULL,
AD9523_STAT_REF_TEST);
static IIO_DEVICE_ATTR(vcxo_clk_present, S_IRUGO,
ad9523_show,
NULL,
AD9523_STAT_VCXO);
static IIO_DEVICE_ATTR(pll2_feedback_clk_present, S_IRUGO,
ad9523_show,
NULL,
AD9523_STAT_PLL2_FB_CLK);
static IIO_DEVICE_ATTR(pll2_reference_clk_present, S_IRUGO,
ad9523_show,
NULL,
AD9523_STAT_PLL2_REF_CLK);
static IIO_DEVICE_ATTR(sync_dividers, S_IWUSR,
NULL,
ad9523_store,
AD9523_SYNC);
static IIO_DEVICE_ATTR(store_eeprom, S_IWUSR,
NULL,
ad9523_store,
AD9523_EEPROM);
static struct attribute *ad9523_attributes[] = {
&iio_dev_attr_sync_dividers.dev_attr.attr,
&iio_dev_attr_store_eeprom.dev_attr.attr,
&iio_dev_attr_pll2_feedback_clk_present.dev_attr.attr,
&iio_dev_attr_pll2_reference_clk_present.dev_attr.attr,
&iio_dev_attr_pll1_reference_clk_a_present.dev_attr.attr,
&iio_dev_attr_pll1_reference_clk_b_present.dev_attr.attr,
&iio_dev_attr_pll1_reference_clk_test_present.dev_attr.attr,
&iio_dev_attr_vcxo_clk_present.dev_attr.attr,
&iio_dev_attr_pll1_locked.dev_attr.attr,
&iio_dev_attr_pll2_locked.dev_attr.attr,
NULL,
};
static const struct attribute_group ad9523_attribute_group = {
.attrs = ad9523_attributes,
};
static int ad9523_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val,
int *val2,
long m)
{
struct ad9523_state *st = iio_priv(indio_dev);
unsigned int code;
int ret;
mutex_lock(&st->lock);
ret = ad9523_read(indio_dev, AD9523_CHANNEL_CLOCK_DIST(chan->channel));
mutex_unlock(&st->lock);
if (ret < 0)
return ret;
switch (m) {
case IIO_CHAN_INFO_RAW:
*val = !(ret & AD9523_CLK_DIST_PWR_DOWN_EN);
return IIO_VAL_INT;
case IIO_CHAN_INFO_FREQUENCY:
*val = st->vco_out_freq[st->vco_out_map[chan->channel]] /
AD9523_CLK_DIST_DIV_REV(ret);
return IIO_VAL_INT;
case IIO_CHAN_INFO_PHASE:
code = (AD9523_CLK_DIST_DIV_PHASE_REV(ret) * 3141592) /
AD9523_CLK_DIST_DIV_REV(ret);
*val = code / 1000000;
*val2 = code % 1000000;
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
}
};
static int ad9523_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int val,
int val2,
long mask)
{
struct ad9523_state *st = iio_priv(indio_dev);
unsigned int reg;
int ret, tmp, code;
mutex_lock(&st->lock);
ret = ad9523_read(indio_dev, AD9523_CHANNEL_CLOCK_DIST(chan->channel));
if (ret < 0)
goto out;
reg = ret;
switch (mask) {
case IIO_CHAN_INFO_RAW:
if (val)
reg &= ~AD9523_CLK_DIST_PWR_DOWN_EN;
else
reg |= AD9523_CLK_DIST_PWR_DOWN_EN;
break;
case IIO_CHAN_INFO_FREQUENCY:
if (val <= 0) {
ret = -EINVAL;
goto out;
}
ret = ad9523_set_clock_provider(indio_dev, chan->channel, val);
if (ret < 0)
goto out;
tmp = st->vco_out_freq[st->vco_out_map[chan->channel]] / val;
tmp = clamp(tmp, 1, 1024);
reg &= ~(0x3FF << 8);
reg |= AD9523_CLK_DIST_DIV(tmp);
break;
case IIO_CHAN_INFO_PHASE:
code = val * 1000000 + val2 % 1000000;
tmp = (code * AD9523_CLK_DIST_DIV_REV(ret)) / 3141592;
tmp = clamp(tmp, 0, 63);
reg &= ~AD9523_CLK_DIST_DIV_PHASE(~0);
reg |= AD9523_CLK_DIST_DIV_PHASE(tmp);
break;
default:
ret = -EINVAL;
goto out;
}
ret = ad9523_write(indio_dev, AD9523_CHANNEL_CLOCK_DIST(chan->channel),
reg);
if (ret < 0)
goto out;
ad9523_io_update(indio_dev);
out:
mutex_unlock(&st->lock);
return ret;
}
static int ad9523_reg_access(struct iio_dev *indio_dev,
unsigned int reg, unsigned int writeval,
unsigned int *readval)
{
struct ad9523_state *st = iio_priv(indio_dev);
int ret;
mutex_lock(&st->lock);
if (readval == NULL) {
ret = ad9523_write(indio_dev, reg | AD9523_R1B, writeval);
ad9523_io_update(indio_dev);
} else {
ret = ad9523_read(indio_dev, reg | AD9523_R1B);
if (ret < 0)
goto out_unlock;
*readval = ret;
ret = 0;
}
out_unlock:
mutex_unlock(&st->lock);
return ret;
}
static const struct iio_info ad9523_info = {
.read_raw = &ad9523_read_raw,
.write_raw = &ad9523_write_raw,
.debugfs_reg_access = &ad9523_reg_access,
.attrs = &ad9523_attribute_group,
};
static int ad9523_setup(struct iio_dev *indio_dev)
{
struct ad9523_state *st = iio_priv(indio_dev);
struct ad9523_platform_data *pdata = st->pdata;
struct ad9523_channel_spec *chan;
unsigned long active_mask = 0;
int ret, i;
ret = ad9523_write(indio_dev, AD9523_SERIAL_PORT_CONFIG,
AD9523_SER_CONF_SOFT_RESET |
(st->spi->mode & SPI_3WIRE ? 0 :
AD9523_SER_CONF_SDO_ACTIVE));
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_READBACK_CTRL,
AD9523_READBACK_CTRL_READ_BUFFERED);
if (ret < 0)
return ret;
ret = ad9523_io_update(indio_dev);
if (ret < 0)
return ret;
/*
* PLL1 Setup
*/
ret = ad9523_write(indio_dev, AD9523_PLL1_REF_A_DIVIDER,
pdata->refa_r_div);
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL1_REF_B_DIVIDER,
pdata->refb_r_div);
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL1_FEEDBACK_DIVIDER,
pdata->pll1_feedback_div);
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL1_CHARGE_PUMP_CTRL,
AD9523_PLL1_CHARGE_PUMP_CURRENT_nA(pdata->
pll1_charge_pump_current_nA) |
AD9523_PLL1_CHARGE_PUMP_MODE_NORMAL |
AD9523_PLL1_BACKLASH_PW_MIN);
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL1_INPUT_RECEIVERS_CTRL,
AD_IF(refa_diff_rcv_en, AD9523_PLL1_REFA_RCV_EN) |
AD_IF(refb_diff_rcv_en, AD9523_PLL1_REFB_RCV_EN) |
AD_IF(osc_in_diff_en, AD9523_PLL1_OSC_IN_DIFF_EN) |
AD_IF(osc_in_cmos_neg_inp_en,
AD9523_PLL1_OSC_IN_CMOS_NEG_INP_EN) |
AD_IF(refa_diff_rcv_en, AD9523_PLL1_REFA_DIFF_RCV_EN) |
AD_IF(refb_diff_rcv_en, AD9523_PLL1_REFB_DIFF_RCV_EN));
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL1_REF_CTRL,
AD_IF(zd_in_diff_en, AD9523_PLL1_ZD_IN_DIFF_EN) |
AD_IF(zd_in_cmos_neg_inp_en,
AD9523_PLL1_ZD_IN_CMOS_NEG_INP_EN) |
AD_IF(zero_delay_mode_internal_en,
AD9523_PLL1_ZERO_DELAY_MODE_INT) |
AD_IF(osc_in_feedback_en, AD9523_PLL1_OSC_IN_PLL_FEEDBACK_EN) |
AD_IF(refa_cmos_neg_inp_en, AD9523_PLL1_REFA_CMOS_NEG_INP_EN) |
AD_IF(refb_cmos_neg_inp_en, AD9523_PLL1_REFB_CMOS_NEG_INP_EN));
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL1_MISC_CTRL,
AD9523_PLL1_REFB_INDEP_DIV_CTRL_EN |
AD9523_PLL1_REF_MODE(pdata->ref_mode));
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL1_LOOP_FILTER_CTRL,
AD9523_PLL1_LOOP_FILTER_RZERO(pdata->pll1_loop_filter_rzero));
if (ret < 0)
return ret;
/*
* PLL2 Setup
*/
ret = ad9523_write(indio_dev, AD9523_PLL2_CHARGE_PUMP,
AD9523_PLL2_CHARGE_PUMP_CURRENT_nA(pdata->
pll2_charge_pump_current_nA));
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL2_FEEDBACK_DIVIDER_AB,
AD9523_PLL2_FB_NDIV_A_CNT(pdata->pll2_ndiv_a_cnt) |
AD9523_PLL2_FB_NDIV_B_CNT(pdata->pll2_ndiv_b_cnt));
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL2_CTRL,
AD9523_PLL2_CHARGE_PUMP_MODE_NORMAL |
AD9523_PLL2_BACKLASH_CTRL_EN |
AD_IF(pll2_freq_doubler_en, AD9523_PLL2_FREQ_DOUBLER_EN));
if (ret < 0)
return ret;
st->vco_freq = div_u64((unsigned long long)pdata->vcxo_freq *
(pdata->pll2_freq_doubler_en ? 2 : 1) *
AD9523_PLL2_FB_NDIV(pdata->pll2_ndiv_a_cnt,
pdata->pll2_ndiv_b_cnt),
pdata->pll2_r2_div);
ret = ad9523_write(indio_dev, AD9523_PLL2_VCO_CTRL,
AD9523_PLL2_VCO_CALIBRATE);
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL2_VCO_DIVIDER,
AD9523_PLL2_VCO_DIV_M1(pdata->pll2_vco_div_m1) |
AD9523_PLL2_VCO_DIV_M2(pdata->pll2_vco_div_m2) |
AD_IFE(pll2_vco_div_m1, 0,
AD9523_PLL2_VCO_DIV_M1_PWR_DOWN_EN) |
AD_IFE(pll2_vco_div_m2, 0,
AD9523_PLL2_VCO_DIV_M2_PWR_DOWN_EN));
if (ret < 0)
return ret;
if (pdata->pll2_vco_div_m1)
st->vco_out_freq[AD9523_VCO1] =
st->vco_freq / pdata->pll2_vco_div_m1;
if (pdata->pll2_vco_div_m2)
st->vco_out_freq[AD9523_VCO2] =
st->vco_freq / pdata->pll2_vco_div_m2;
st->vco_out_freq[AD9523_VCXO] = pdata->vcxo_freq;
ret = ad9523_write(indio_dev, AD9523_PLL2_R2_DIVIDER,
AD9523_PLL2_R2_DIVIDER_VAL(pdata->pll2_r2_div));
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_PLL2_LOOP_FILTER_CTRL,
AD9523_PLL2_LOOP_FILTER_CPOLE1(pdata->cpole1) |
AD9523_PLL2_LOOP_FILTER_RZERO(pdata->rzero) |
AD9523_PLL2_LOOP_FILTER_RPOLE2(pdata->rpole2) |
AD_IF(rzero_bypass_en,
AD9523_PLL2_LOOP_FILTER_RZERO_BYPASS_EN));
if (ret < 0)
return ret;
for (i = 0; i < pdata->num_channels; i++) {
chan = &pdata->channels[i];
if (chan->channel_num < AD9523_NUM_CHAN) {
__set_bit(chan->channel_num, &active_mask);
ret = ad9523_write(indio_dev,
AD9523_CHANNEL_CLOCK_DIST(chan->channel_num),
AD9523_CLK_DIST_DRIVER_MODE(chan->driver_mode) |
AD9523_CLK_DIST_DIV(chan->channel_divider) |
AD9523_CLK_DIST_DIV_PHASE(chan->divider_phase) |
(chan->sync_ignore_en ?
AD9523_CLK_DIST_IGNORE_SYNC_EN : 0) |
(chan->divider_output_invert_en ?
AD9523_CLK_DIST_INV_DIV_OUTPUT_EN : 0) |
(chan->low_power_mode_en ?
AD9523_CLK_DIST_LOW_PWR_MODE_EN : 0) |
(chan->output_dis ?
AD9523_CLK_DIST_PWR_DOWN_EN : 0));
if (ret < 0)
return ret;
ret = ad9523_vco_out_map(indio_dev, chan->channel_num,
chan->use_alt_clock_src);
if (ret < 0)
return ret;
st->ad9523_channels[i].type = IIO_ALTVOLTAGE;
st->ad9523_channels[i].output = 1;
st->ad9523_channels[i].indexed = 1;
st->ad9523_channels[i].channel = chan->channel_num;
st->ad9523_channels[i].extend_name =
chan->extended_name;
st->ad9523_channels[i].info_mask_separate =
BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_PHASE) |
BIT(IIO_CHAN_INFO_FREQUENCY);
}
}
for_each_clear_bit(i, &active_mask, AD9523_NUM_CHAN) {
ret = ad9523_write(indio_dev,
AD9523_CHANNEL_CLOCK_DIST(i),
AD9523_CLK_DIST_DRIVER_MODE(TRISTATE) |
AD9523_CLK_DIST_PWR_DOWN_EN);
if (ret < 0)
return ret;
}
ret = ad9523_write(indio_dev, AD9523_POWER_DOWN_CTRL, 0);
if (ret < 0)
return ret;
ret = ad9523_write(indio_dev, AD9523_STATUS_SIGNALS,
AD9523_STATUS_MONITOR_01_PLL12_LOCKED);
if (ret < 0)
return ret;
ret = ad9523_io_update(indio_dev);
if (ret < 0)
return ret;
return 0;
}
static int ad9523_probe(struct spi_device *spi)
{
struct ad9523_platform_data *pdata = spi->dev.platform_data;
struct iio_dev *indio_dev;
struct ad9523_state *st;
int ret;
if (!pdata) {
dev_err(&spi->dev, "no platform data?\n");
return -EINVAL;
}
indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
if (indio_dev == NULL)
return -ENOMEM;
st = iio_priv(indio_dev);
mutex_init(&st->lock);
st->reg = devm_regulator_get(&spi->dev, "vcc");
if (!IS_ERR(st->reg)) {
ret = regulator_enable(st->reg);
if (ret)
return ret;
}
st->pwrdown_gpio = devm_gpiod_get_optional(&spi->dev, "powerdown",
GPIOD_OUT_HIGH);
if (IS_ERR(st->pwrdown_gpio)) {
ret = PTR_ERR(st->pwrdown_gpio);
goto error_disable_reg;
}
st->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(st->reset_gpio)) {
ret = PTR_ERR(st->reset_gpio);
goto error_disable_reg;
}
if (st->reset_gpio) {
udelay(1);
gpiod_direction_output(st->reset_gpio, 1);
}
st->sync_gpio = devm_gpiod_get_optional(&spi->dev, "sync",
GPIOD_OUT_HIGH);
if (IS_ERR(st->sync_gpio)) {
ret = PTR_ERR(st->sync_gpio);
goto error_disable_reg;
}
spi_set_drvdata(spi, indio_dev);
st->spi = spi;
st->pdata = pdata;
indio_dev->name = (pdata->name[0] != 0) ? pdata->name :
spi_get_device_id(spi)->name;
indio_dev->info = &ad9523_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = st->ad9523_channels;
indio_dev->num_channels = pdata->num_channels;
ret = ad9523_setup(indio_dev);
if (ret < 0)
goto error_disable_reg;
ret = iio_device_register(indio_dev);
if (ret)
goto error_disable_reg;
dev_info(&spi->dev, "probed %s\n", indio_dev->name);
return 0;
error_disable_reg:
if (!IS_ERR(st->reg))
regulator_disable(st->reg);
return ret;
}
static int ad9523_remove(struct spi_device *spi)
{
struct iio_dev *indio_dev = spi_get_drvdata(spi);
struct ad9523_state *st = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
if (!IS_ERR(st->reg))
regulator_disable(st->reg);
return 0;
}
static const struct spi_device_id ad9523_id[] = {
{"ad9523-1", 9523},
{}
};
MODULE_DEVICE_TABLE(spi, ad9523_id);
static struct spi_driver ad9523_driver = {
.driver = {
.name = "ad9523",
},
.probe = ad9523_probe,
.remove = ad9523_remove,
.id_table = ad9523_id,
};
module_spi_driver(ad9523_driver);
MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
MODULE_DESCRIPTION("Analog Devices AD9523 CLOCKDIST/PLL");
MODULE_LICENSE("GPL v2");
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